Comment by kouteiheika

> Much of the extra weight of Claude Code and Codex harness are (ostensibly?) for security and alignment purposes.

Um, no? Have you actually read Claude Code's system prompt and tools?

Here's Fable's system prompt: https://github.com/navanchauhan/agent-autopsy/blob/6d9c00e54...

There are a few lines of what I would call "for security and alignment purposes", but it's not the majority. And the majority of the bloat is from the tool descriptions.

The system prompt in this case has pretty much nothing to do with the built-in guard rails, that is: you cannot sidestep Claude's guard rails by editing/replacing the system prompt (which you officially can with Claude Code's `--system-prompt-file`).